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Finding the Third Proportional to 5,381 and 7,620.50

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Solution

The third proportional to 5,381 and 7,620.50 is: 10,792.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381 : 7,620.50 = 7,620.50 : x
  2. Step 2: Convert to fraction form
    5,381/7,620.50 = 7,620.50/x
  3. Step 3: Cross multiply
    5,381x = 7,620.50 × 7,620.50
  4. Step 4: Simplify right side
    5,381x = 58,072,020.25
  5. Step 5: Solve for x
    x = 58,072,020.25/5,381
  6. Step 6: Final answer
    x = 10,792.05

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.